An α-particle of energy 5 MeV is scattered through 180° by a f

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

21.

If radius of  nucleus is estimated to be 3.6 Fermi then the radius nucleus

  • 6 fermi

  • 8 fermi

  • 4 fermi

  • 4 fermi

310 Views

22.

A nuclear transformation is denoted by X(n, α) . Which of the following is the nucleus of element X?

  • straight C presuperscript 12 subscript 6
  • straight B presubscript 5 presuperscript 10
  • straight B presubscript 5 presuperscript 9
  • straight B presubscript 5 presuperscript 9
542 Views

23.

Two spherical conductor B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion, between B and C is

  • F/4

  • 3F/4

  • 3F/8

  • 3F/8

199 Views

24.

A nucleus disintegrates into two nuclear parts which have their velocities in the ratio 2:1. The ratio of their nuclear sizes will be

  • 21/3:1

  • 1:31/2

  • 31/2:1

  • 31/2:1

222 Views

Advertisement
25.

The binding energy per nucleon of deuteron (21H) and helium nucleus (42He) is 1.1 MeV and 7 MeV respectively. If two deuteron nuclei react to form a single helium nucleus, then the energy released is

  • 13.9 MeV

  • 26.9 MeV

  • 23.6 MeV

  • 23.6 MeV

551 Views

Advertisement

26.

An α-particle of energy 5 MeV is scattered through 180° by a fixed uranium nucleus. The distance of the closest approach is of the order of

  • 1 Å

  • 10−10 cm

  • 10−12 cm

  • 10−12 cm


C.

10−12 cm

At closest approach, all the kinetic energy of the α-particle will converted into the potential energy of the system, K.E. = P.E.

1123 Views

Advertisement
27.

Which of the following particle when bombards on 65Cu will turn into 66Cu ?

  • Proton

  • Neutron

  • Electron

  • Alpha particle


28.

8 g of Cu66 undergoes radioactive decay and after 15 minutes only 1 g remains. The half-life, in minutes, is then

  • 15 ln (2) / ln(8)

  • 15 ln (8) / ln (2)

  • 15/8

  • 8/15


Advertisement
29.

For a light nuclei, which of the following relation between the atomic number (Z) and mass number (A) is valid ?

  • A = Z/2

  • Z = A

  • Z = A/2

  • Z = A2


30.

During β emission,

  • a neutron in the nucleus decays emitting an electron

  • an atomic electron is ejected

  • an electron already present within the nucleus is ejected

  • a part of the binding energy of the nucleus is converted into an electron


Advertisement